Fix public Obj-C header import.

Fixes the Cocoapod.

Bug: None
Change-Id: If3ace3d01ba111fc83ae18455e8ff1cb5fc7b476
Reviewed-on: https://webrtc-review.googlesource.com/1572
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Daniela Jovanoska Petrenko <denicija@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19863}
diff --git a/sdk/objc/Framework/Headers/WebRTC/RTCAudioSession.h b/sdk/objc/Framework/Headers/WebRTC/RTCAudioSession.h
index d9547d6..354634e 100644
--- a/sdk/objc/Framework/Headers/WebRTC/RTCAudioSession.h
+++ b/sdk/objc/Framework/Headers/WebRTC/RTCAudioSession.h
@@ -11,7 +11,7 @@
 #import <AVFoundation/AVFoundation.h>
 #import <Foundation/Foundation.h>
 
-#import "sdk/objc/Framework/Headers/WebRTC/RTCMacros.h"
+#import <WebRTC/RTCMacros.h>
 
 NS_ASSUME_NONNULL_BEGIN